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Author Topic: Crankshaft Position Sensor failing causing Service Engine Soon light on  (Read 1832 times)
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sdriscol
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« on: August 25, 2011, 11:14:22 AM »

I really need help on this one.  The Service Engine Soon light is on in my 01 Tek.  I had the code read and it came back as the Crank Position Sensor.  The car also has not been running real well, sometimes at a stop it will die.  Also while driving down the road it will start to shudder and then die, to which I have to pull over and start again.  Sometimes it starts right up other times it doesn't.  This was found out while driving to work one day.  I drove to work which is like a 45 minute drive, and as I was almost there it died.  That is also when the service engine soon light came on.  I had the code read and it pointed to the Crank Position Sensor 4x.  I looked and I could not find a 4x sensor, so thinking maybe it meant 24x, I replaced this one.  Still no dice as it continues to have this problem.  I took it back again and it again read Crank Position Sensor.  Now the question I have is, if it is the 7x sensor, how do you get at it to replace?  I looked at it last night and found that the shielding around the wires leading to the sensor was so hard and brittle it just fell apart.  Maybe the issue is in the cable, I am not sure, I can't get my hand in there to really check anything.  Any type of advice would be greatly appreciated.

Thanks,
Shawn
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Wolfy1969
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« Reply #1 on: August 26, 2011, 12:10:45 AM »

Hi Shawn,

It's not going to be an easy thing to replace if that's what actually need replacing.  Look at my 3.4L V6 Teardown thread Block Teardown Pt. 7.  About the 12th pic down is a close up of the shield and the bolt holding it on.  More than likely, though, it probably is the cable.  Mine had some spots where the insulation was rubbed or melted away on both wires where they twisted together - I'm guessing that was causing a direct short.  I wiped the wires clean, pulled off all the old tubing, taped up (or you could cut and butt-connect) the bad areas.  Then, I bought some new split loom tubing at Wal-Mart (look by car stereo section) and put new tubing on it.

This wire has some plastic clips holding it in place that break off easily, and mine was laying on the exhaust heat shield which melted the insulation.  After I fixed it, I re-routed it away from there - you can see this in the Rebuild pics of when I put the engine back together.
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